• 380 can be written using four 4's:

380 has 12 divisors (see below), whose sum is σ = 840. Its totient is φ = 144.

The previous prime is 379. The next prime is 383. The reversal of 380 is 83.

380 = 3^{2} + 4^{2} + ... + 10^{2}.

380 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a O'Halloran number.

It is a plaindrome in base 12, base 13 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11 + ... + 29.

It is an arithmetic number, because the mean of its divisors is an integer number (70).

It is a pronic number, being equal to 19×20.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420).

380 is an abundant number, since it is smaller than the sum of its proper divisors (460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

380 is a wasteful number, since it uses less digits than its factorization.

380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28 (or 26 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 380 is about 19.4935886896. The cubic root of 380 is about 7.2431564434.

Adding to 380 its product of nonzero digits (24), we get a palindrome (404).

The spelling of 380 in words is "three hundred eighty", and thus it is an aban number and an oban number.

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